hequn8128 commented on a change in pull request #9248:
[FLINK-13446][table-runtime-blink] Fix assign logic for row count sliding window
URL: https://github.com/apache/flink/pull/9248#discussion_r308100033
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File path:
flink-table/flink-table-runtime-blink/src/main/java/org/apache/flink/table/runtime/operators/window/assigners/CountSlidingWindowAssigner.java
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@@ -67,17 +67,19 @@ public void open(InternalWindowProcessFunction.Context<?,
CountWindow> ctx) thro
Long countValue = count.value();
long currentCount = countValue == null ? 0L : countValue;
count.update(currentCount + 1);
- long lastId = currentCount / windowSlide;
- long lastStart = lastId * windowSlide;
- long lastEnd = lastStart + windowSize - 1;
+ long windowId = currentCount / windowSlide;
+ long windowEnd = windowId * windowSlide + windowSlide - 1;
+ long windowStart = windowEnd - windowSize + 1;
List<CountWindow> windows = new ArrayList<>();
- while (lastId >= 0 && lastStart <= currentCount && currentCount
<= lastEnd) {
- if (lastStart <= currentCount && currentCount <=
lastEnd) {
- windows.add(new CountWindow(lastId));
+ while ((windowStart <= currentCount) && (currentCount <=
windowEnd)) {
+ if (0 > windowStart) {
+ windows.add(new CountWindow(windowId,
windowSize + windowStart));
+ } else {
+ windows.add(new CountWindow(windowId,
windowSize));
Review comment:
Good idea.
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